Matches 1 - 50 out of 151 1 2 3 4 >
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7609586 Acoustic projector having minimized mechanical stresses  
An acoustic projector which includes an outer shell ( 8 ) formed of a reinforced epoxy resin having a longitudinal slot ( 14 ) has an inner reinforcing liner ( 20 ) formed of metal to reduce...
7483339 Acoustic projector and method of manufacture  
An underwater acoustic projector comprising one or more cylindrical shell segments ( 8 ), each shell segment ( 8 ) having an even number of drivers ( 10 ) mounted therein, and the method of...
7372777 Sonic instrumentation apparatus and method for cement bond logging  
A longitudinally segmented acoustic transducer for a cement bond logging (CBL) tool having a plurality of adjoining PZT ring-like segments driven synchronously in parallel by one or more pulses and...
7069795 Sensor using electro active curved helix and double helix  
Various sensors use an electro-active device ( 11 ) electrically connected to a detector circuit. The electro-active device ( 11 ) comprises an electro-active structure in the form of a continuous...
6951138 Method and apparatus for an ocean bottom seismic acquisition technique  
A seismometer having a hydrodynamically efficient shaped body containing a seismic sensor or source, having a propulsion unit located and a control unit for directional control of the propulsion...
6873572 Low-frequency sonar countermeasure  
A multi-port projector of acoustic energy in water includes a cylindrical hollow transducer having open annular ends. A thin, flexible member is secured to each annular end to extend across each...
6739423 Acoustic logging tool  
A sleeve for an acoustic logging tool has a structure with a window section having fewer bars than a conventional sleeve separated by a slotted region with thin circumferential slots which are...
6552961 Seismic source sensor  
A system for detecting source acoustic energy in seismic operations. The system is operable on land and in marine applications. On land, a piezoelectric film is positioned between a vibrator or...
6512980 Noise reference sensor for use in a dual sensor towed streamer  
A method of marine seismic surveying, whereby a seismic streamer is towed in a body of water while deploying three (3) sensors in close proximity to each other. In one embodiment of the invention,...
6337835 Electromechanical converter and method of producing same  
The present invention relates to an electromechanical converter, a method of manufacturing same, as well as to a composite system including the electromechanical converter. The inventive...
6285631 Slotted cylinder transducer with sealing boot and method of making same  
A sealed slotted cylinder includes an active transducer assembly, end caps at each end of the assembly, and a boot fused to the end caps and sealing the assembly. The sealed slotted cylinder is...
RE37204 Transducer assembly  
A support member preferably made of a metal such as cold rolled steel is disposed in a looped configuration and is provided with a gap. A transducer member preferably made of a piezoelectric...
6109109 High energy, low frequency, ultrasonic transducer  
A wide bandwidth, ultrasonic transducer to generate nondispersive, extensional, pulsed acoustic pressure waves into concrete reinforced rods and tendons. The wave propagation distance is limited to...
6076629 Low frequency flextensional acoustic source for underwater use  
6069845 Composite marine seismic source  
A marine seismic source for generating acoustic source energy from electrical power. A slotted housing has an exterior surface engaged with an electrically activated transducer such as a...
6002648 Slotted cylinder marine siesmic method and source  
A seismic method and system for generating seismic source energy in marine geophysical operations. A slotted housing is moveable by the actuation of piezoelectric elements to generate high power,...
5796676 Hydrophone module for a marine seismic cable  
A low-profile hydrophone module for a marine seismic system includes a block having a curved surface and a receiving surface in which an open cavity is disposed, a hydrophone assembly, to which...
5784341 Underwater acoustic transmitter for large submersion  
The invention relates to underwater acoustic transmitters intended to be submerged at large depths. It consists in threading the set of annuli forming the transmitter onto an internal tube (303)...
5781509 Wide beam array with sharp cutoff  
A transducer array is constructed from a constant arc length portion of a ght circular cylindrical shell of piezoelectric transduction material. The constant arc length portion is segmented evenly...
5742559 Hydrophone and array thereof  
A piezoelectric transducer hydrophone comprised of a plurality of longitudinal segments is described. The longitudinal segments allow the transducers to be readily attached to cables to form...
5726952 Sound or ultrasound sensor  
A sound or ultrasound sensor is provided for transmitting and/or receiving sound or ultrasound, which is mechanically robust and chemically resistant and which has an adjustable emission...
5658534 Sonochemical apparatus  
A liquid is subjected to ultrasound within a stainless steel pipe (35) of wall thickness 2.5 mm. Three ultrasonic transducers (56) are equally spaced around the pipe, each fixed to one end of a...
5579287 Process and transducer for emitting wide band and low frequency acoustic waves in unlimited immersion depths  
The present invention relates to a process and transducer for emitting wide and and low frequency acoustic waves in unlimited immersion depth. The invention is applied to tranducers comprising at...
5550791 Composite hydrophone array assembly and shading  
A composite hydrophone array assembly is made from a compliant mandrel such s a hollow tube and at least one wrap of piezoelectric film adhered to the compliant hollow tube at a plurality of...
5546361 Directional electro-acoustic transducers comprising a sealed sell consisting of two portions  
The invention relates to directional electro-acoustic transducers compris a sealed shell consisting of two portions. A transducer according to the invention comprises one or more electro-acoustic...
5508976 Low frequency underwater acoustic transducer  
An underwater acoustic transducer for providing high amplitude low frequency acoustic output wherein a plurality of flextensional transducer ovals are formed into a mechanical transformer ring with...
5483502 Method and apparatus for emitting high power acoustic waves using transducers  
A transducer includes at least one cylindrical driving assembly and at least one headmass coupled to an end of the cylindrical driving assembly. The headmass has an external ring that surrounds a...
5477101 Downhole acoustic transducer  
An acoustic transducer comprises two pairs of opposite elongate segments (20) placed inside a deformable tube (14). Drive means (22) operable to expand in a direction orthogonal to the axis of the...
5412621 Encapsulated hydrophone element for towed hydrophone array  
Disclosed is an encapsulated hydrophone assembly for use in a towed hydrophone array. The assembly comprises (1) a hydrophone element having a hydrophone electrical conductor, (2) an insulated...
5406531 Low frequency flex-beam underwater acoustic transducer  
A low frequency flex-beam underwater acoustic transducer has a base, a flexible beam having one end cantilever mounted on the base, and piezoelectric driving means, for flexurally driving the beam....
5363346 Conforming tuning coupler for flextensional transducers  
A flextensional transducer includes a stack of driving elements disposed ng a linear axis to convert a driving power into vibrational energy. End pieces, disposed at each end of the stack, have...
5361240 Acoustic sensor  
A pressure compensated hydrophone assembly consists of a hollow mandrel that has an outer surface. The central portion of the outer surface of the mandrel defines a concavity. A flexible, resilient...
5357486 Acoustic transducer  
A piezoelectric film strip is wrapped a plurality of times around a flexible inert mandrel that has standoff collars on each end. The film-wrapped mandrel is hermetically sealed inside a hollow...
5321333 Torsional shear wave transducer  
A low frequency torsional transducer for the generation and/or reception of shear waves in a substantially solid medium. The transducer includes a spool like radiating structure to which are...
H001308 Narrow band acoustic source  
A seismic source for downhole use is disclosed which is formed by an outer tubular member having weighted ends which carries within a coaxially mounted tubularly shaped piezoelectric element. The...
5291461 Elastomer structure for transducers  
An elastomer support for a sonar transducer includes a ceramic stack electromechanical driver, a pair of rigid support members, and a pair of elastomer layers disposed between the ceramic stack...
5276657 Metal-electroactive ceramic composite actuators  
The metal-ceramic actuator includes an electroactive substrate having at least a pair of opposed planar surfaces and a determined thickness, with the ceramic substrate being poled in its thickness...
5267223 Electroacoustic transducer seal  
A compliant cover for use with acoustic source transducers includes a rubber boot bonded to a shell of the transducer. The cover has a groove molded within a surface thereof to allow the shell to...
5237543 Moment bender transducer drive  
A transducer includes an acoustic radiating member for generating acoustic energy in a transmitting medium and a driver member that is pivotally connected to the radiating member. The driver member...
5229980 Broadband electroacoustic transducer  
A broadband electroacoustic transducer is disclosed which provides an improved response over a relatively broad range of frequencies. The transducer includes a plurality of tines extending between...
5220538 Electro-acoustic transducer insulation structure  
A bonded insulator flexural transducer for use in sonar applications includes a hollow metal tube having an inner surface, a segmented ceramic electromechanical driver disposed along an inner...
5204843 Integrated reception system of great length for sensing acoustic waves  
A reception system including a central core (5) formed of a traction cable (6) and a harness (7) of conducting wires. A fibrous or porous acoustic screen (8) made, for example, from a fibrous or...
5199004 Sealed acoustical element using conductive epoxy  
A radially-polarized piezoelectric cylindrical transducer is provided. The ransducer has an electrically conductive end cap affixed with a conductive epoxy to one end of a piezoelectric body and a...
5166907 Frequency agile sonic transducer  
A solid-state tunable transducer has been developed by incorporating an elastically nonlinear material, silicone rubber, into an electroacoustic transducer made from piezoelectric ceramics. The...
5132942 Low frequency electroacoustic transducer  
This invention concerns a low frequency, high energy output electroacoustic transducer. It utilizes a vibratory unit formed of a stack of hollow ceramic cylinders about which is fitted a resilient...
5130953 Submersible electro-acoustic transducer  
An electro-acoustic transducer comprises two transducer units each having first and second ends, a tubular supporting member disposed between the two transducer units, and a pair of oppositely...
5103130 Sound reinforcing seal for slotted acoustic transducers  
A split-ring or split-cylinder transducer in which a full or partial boot covering a shell is caused to be looped into the gap of the shell so that outward radial movement and circumferential...
5099460 Sonar transducer  
The sonar transducer includes a metal core about which is situated a cylindrical piezoelectric ceramic ring element with paper interposed therebetween. In order to improve resistance to fracture...
5070486 Process to increase the power of the low frequency electro acoustic transducers and corresponding transducers  
An electroacoustic transducer according to the invention comprises a stacking of annular plates (13) made of piezoelectric ceramics alternating with annular electrodes (14) and pressed by an axial...
5043952 Monopole transmitter for a sonic well tool  
A monopole transmitter for a sonic well tool includes an axial tube, a piezoceramic cylinder surrounding the axial tube, an endcap disposed at each end of and firmly contacting the cylinder, and an...
Matches 1 - 50 out of 151 1 2 3 4 >